1732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy/* mix.c - A very basic mixer. 2732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy * 3732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy * Copyright 2014 Brad Conroy, dedicated to the Public Domain. 4732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy * 5732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 673b8bb5adecf796c717749eeb309f7659c7089dbRob LandleyUSE_MIX(NEWTOY(mix, "c:d:l#r#", TOYFLAG_USR|TOYFLAG_BIN)) 773b8bb5adecf796c717749eeb309f7659c7089dbRob Landley 8732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroyconfig MIX 9732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy bool "mix" 10989f453e133962c711d360b6f2e87ee5b0e56b22Rob Landley default y 11732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy help 1288fe31338f02f8d189e5bfb9164e97b5b7e23d62Rob Landley usage: mix [-d DEV] [-c CHANNEL] [-l VOL] [-r RIGHT] 1373b8bb5adecf796c717749eeb309f7659c7089dbRob Landley 1473b8bb5adecf796c717749eeb309f7659c7089dbRob Landley List OSS sound channels (module snd-mixer-oss), or set volume(s). 15732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 1688fe31338f02f8d189e5bfb9164e97b5b7e23d62Rob Landley -c CHANNEL Set/show volume of CHANNEL (default first channel found) 1773b8bb5adecf796c717749eeb309f7659c7089dbRob Landley -d DEV Device node (default /dev/mixer) 1873b8bb5adecf796c717749eeb309f7659c7089dbRob Landley -l VOL Volume level 1973b8bb5adecf796c717749eeb309f7659c7089dbRob Landley -r RIGHT Volume of right stereo channel (with -r, -l sets left volume) 20732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy*/ 21732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 22732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy#define FOR_mix 23732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy#include "toys.h" 2473b8bb5adecf796c717749eeb309f7659c7089dbRob Landley#include <linux/soundcard.h> 25732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 26732ef894567bf1d98abd88594bd68b8ccf309d72Bradley ConroyGLOBALS( 2773b8bb5adecf796c717749eeb309f7659c7089dbRob Landley long right; 2873b8bb5adecf796c717749eeb309f7659c7089dbRob Landley long level; 2973b8bb5adecf796c717749eeb309f7659c7089dbRob Landley char *dev; 3073b8bb5adecf796c717749eeb309f7659c7089dbRob Landley char *chan; 31732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy) 32732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 33732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroyvoid mix_main(void) 34732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy{ 3573b8bb5adecf796c717749eeb309f7659c7089dbRob Landley const char *channels[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES; 3673b8bb5adecf796c717749eeb309f7659c7089dbRob Landley int mask, channel = -1, level, fd; 37732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 3873b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if (!TT.dev) TT.dev = "/dev/mixer"; 3973b8bb5adecf796c717749eeb309f7659c7089dbRob Landley fd = xopen(TT.dev, O_RDWR|O_NONBLOCK); 4073b8bb5adecf796c717749eeb309f7659c7089dbRob Landley xioctl(fd, SOUND_MIXER_READ_DEVMASK, &mask); 41732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 4273b8bb5adecf796c717749eeb309f7659c7089dbRob Landley for (channel = 0; channel < SOUND_MIXER_NRDEVICES; channel++) { 4373b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if ((1<<channel) & mask) { 4488fe31338f02f8d189e5bfb9164e97b5b7e23d62Rob Landley if (TT.chan) { 4588fe31338f02f8d189e5bfb9164e97b5b7e23d62Rob Landley if (!strcmp(channels[channel], TT.chan)) break; 4688fe31338f02f8d189e5bfb9164e97b5b7e23d62Rob Landley } else if (toys.optflags & FLAG_l) break; 4773b8bb5adecf796c717749eeb309f7659c7089dbRob Landley else printf("%s\n", channels[channel]); 48732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy } 49732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy } 50732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 5173b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if (!(toys.optflags & (FLAG_c|FLAG_l))) return; 5273b8bb5adecf796c717749eeb309f7659c7089dbRob Landley else if (channel == SOUND_MIXER_NRDEVICES) error_exit("bad -c '%s'", TT.chan); 53732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 5473b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if (!(toys.optflags & FLAG_l)) { 5573b8bb5adecf796c717749eeb309f7659c7089dbRob Landley xioctl(fd, MIXER_READ(channel), &level); 5673b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if (level > 0xFF) 5773b8bb5adecf796c717749eeb309f7659c7089dbRob Landley xprintf("%s:%s = left:%d\t right:%d\n", 5873b8bb5adecf796c717749eeb309f7659c7089dbRob Landley TT.dev, channels[channel], level>>8, level & 0xFF); 5973b8bb5adecf796c717749eeb309f7659c7089dbRob Landley else xprintf("%s:%s = %d\n", TT.dev, channels[channel], level); 6073b8bb5adecf796c717749eeb309f7659c7089dbRob Landley } else { 6173b8bb5adecf796c717749eeb309f7659c7089dbRob Landley level = TT.level; 6273b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if (!(toys.optflags & FLAG_r)) level = TT.right | (level<<8); 6373b8bb5adecf796c717749eeb309f7659c7089dbRob Landley 6473b8bb5adecf796c717749eeb309f7659c7089dbRob Landley xioctl(fd, MIXER_WRITE(channel), &level); 6573b8bb5adecf796c717749eeb309f7659c7089dbRob Landley } 66732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy 6773b8bb5adecf796c717749eeb309f7659c7089dbRob Landley if (CFG_TOYBOX_FREE) close(fd); 68732ef894567bf1d98abd88594bd68b8ccf309d72Bradley Conroy} 69